Leiothylax Warm.

Submerged freshwater herbs; basal part ribbon-like. Stems long, simple or branched. Leaves dichotomously branched, segments linear. Spathellas (spathaceous bracts) in clusters along the stems; flower inverted (reflexed) within the spathella. Pedicel long, bearing the flower erect. Tepals 2, minute. Fruit a capsule smooth, globose, dehiscing into 2 equal valves. Seeds numerous, small, red-brown, testa reticulate.

Worldwide: Three species, two of which occur in Cameroon, D.R. Congo and Angola and one in Central Africa.

Zambia: 1 taxon.